Update app.py

app.py

@@ -41,7 +41,7 @@ def process_pdf(file):
     docs = text_splitter.split_documents(documents)
     
     # Add documents to Pinecone Vector Store
-    vectorstore = Pinecone.from_existing_index(index_name, embeddings)
+    vectorstore = PineconeVectorStore(index_name, embeddings)
     vectorstore.add_documents(docs)
     
     # Prepare log data